Note: there are other options but NetApp will provide these as when necessary

shutdown

halt [-t <mins>] [-f]

-t = shutdown after minutes specified
-f = used with HA clustering, means that the partner filer does not take over

restart

reboot [-t <mins>] [-s] [-r] [-f]

-t = reboot in specified minutes
-s = clean reboot but also power cycle the filer (like pushing the off button)
-r = bypasses the shutdown (not clean) and power cycles the filer
-f = used with HA clustering, means that the partner filer does not take over